io_uring/tctx: work around xa_store() allocation error issue

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-56584
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-12-27 15:15:17 UTC
Updated2026-04-18 09:16:09 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: io_uring/tctx: work around xa_store() allocation error issue syzbot triggered the following WARN_ON: WARNING: CPU: 0 PID: 16 at io_uring/tctx.c:51 __io_uring_free+0xfa/0x140 io_uring/tctx.c:51 which is the WARN_ON_ONCE(!xa_empty(&tctx->xa)); sanity check in __io_uring_free() when a io_uring_task is going through its final put. The syzbot test case includes injecting memory allocation failures, and it very much looks like xa_store() can fail one of its memory allocations and end up with ->head being non-NULL even though no entries exist in the xarray. Until this issue gets sorted out, work around it by attempting to iterate entries in our xarray, and WARN_ON_ONCE() if one is found.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-770

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e e05c070b401f6365c503e2b59f091331965c4fb9 git Not specified
CNA Linux Linux affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e 3a84fa784710990964c1e35df743851ab2863898 git Not specified
CNA Linux Linux affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e 94ad56f61b873ffeebcc620d451eacfbdf9d40f0 git Not specified
CNA Linux Linux affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e 42882b583095dcf747da6e3af1daeff40e27033e git Not specified
CNA Linux Linux affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e d5b2ddf1f90c7248eff9630b95895c8950f2f36d git Not specified
CNA Linux Linux affected 2b188cc1bb857a9d4701ae59aa7768b5124e262e 7eb75ce7527129d7f1fee6951566af409a37a1c4 git Not specified
CNA Linux Linux affected 5.1 Not specified
CNA Linux Linux unaffected 5.1 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.120 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.66 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.5 6.12.* semver Not specified
CNA Linux Linux unaffected 6.13 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/94ad56f61b873ffeebcc620d451eacfbdf9d40f0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d5b2ddf1f90c7248eff9630b95895c8950f2f36d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/42882b583095dcf747da6e3af1daeff40e27033e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3a84fa784710990964c1e35df743851ab2863898 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e05c070b401f6365c503e2b59f091331965c4fb9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7eb75ce7527129d7f1fee6951566af409a37a1c4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/03/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
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